2-542.1.19 Optional interface (Refer to the page 4-5 CN7)As an optional connector, the system is provided with a connector intended to make connections of the PCI (PeripheralComponent Interconnect) buses for two slots.When a card conforming to the PCI Bus Specifications is mounted, it becomes possible to have a variety of functions externally.The PCI buses conform to the Board Specifications of +5V.Pin Signal name Pin Signal name Pin Signal name Pin Signal name1 -12V 2 GND 3 +12V 4 +12V5 GND 6 GND 7 +5V 8 +5V9 INTA# 10 INTB# 11 INTC# 12 INTD#13 Reserve 14 Reserve 15 Reserve 16 SERIRQ17 Reserve 18 GND 19 RST# 20 CLK021 CLK1 22 GND 23 GNT0# 24 REQ0#25 GNT1# 26 IREQ1# 27 PME# 28 +5V29 +5V 30 AD31 31 AD30 32 AD2933 +3.3V 34 AD28 35 AD27 36 AD2637 AD25 38 AD24 39 C/BE3# 40 AD2341 +3.3V 42 GND 43 AD22 44 AD2145 AD20 46 AD19 47 GND 48 +3.3V49 AD18 50 AD17 51 AD16 52 C/BE2#53 +3.3V 54 GND 55 FRAME# 56 IRDY#57 +3.3V 58 TRDY# 59 DEVSEL# 60 GND61 GND 62 STOP# 63 LOCK# 64 +3.3V65 +3.3V 66 GND 67 SERR# 68 PAR69 C/BE1# 70 AD15 71 AD14 72 +3.3V73 GND 74 AD13 75 AD12 76 AD1177 AD10 78 GND 79 GND 80 AD981 AD8 82 C/BE0# 83 AD7 84 +3.3V85 +3.3V 86 AD6 87 AD5 88 AD489 AD3 90 GND 91 GND 92 AD293 AD1 94 AD0 95 +5V 96 +5V97 +5V 98 +5V 99 +5V 100 +5V